Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities:
Net cash provided by operating activities		$ 4,175	$ 2,108
Cash Flows from Investing Activities:
Capital expenditures		(1,734)	(1,780)
Purchases of short-term and other investments		(1,326)	(1,587)
Proceeds from sale of short-term and other investments		1,455	1,561
Investment in affiliates		(139)	0
Proceeds from sale of property and equipment		20	5
Other, net		7	123
Net cash used in investing activities		(1,717)	(1,678)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt and airport construction financing		1,308	1,139
Repurchases of common stock		(969)	(712)
Payments of long-term debt		(1,294)	(525)
Principal payments under capital leases		(62)	(59)
Other, net		(41)	(75)
Net cash used in financing activities		(1,058)	(232)
Net increase in cash, cash equivalents and restricted cash		1,400	198
Cash, cash equivalents and restricted cash at beginning of the period		1,591	2,303
Cash, cash equivalents and restricted cash at end of the period	[1]	2,991	2,501
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt and capital leases		139	907
Airport construction financing		12	32
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by operating activities		4,158	2,095
Cash Flows from Investing Activities:
Capital expenditures		(1,734)	(1,780)
Purchases of short-term investments and other investments		(1,326)	(1,587)
Proceeds from sale of short-term and other investments		1,455	1,561
Investment in affiliates		(139)	0
Proceeds from sale of property and equipment		20	5
Other, net		7	123
Net cash used in investing activities		(1,717)	(1,678)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt and airport construction financing		1,308	1,139
Dividend to UAL		(969)	(712)
Payments of long-term debt		(1,294)	(525)
Principal payments under capital leases		(62)	(59)
Other, net		(24)	(62)
Net cash used in financing activities		(1,041)	(219)
Net increase in cash, cash equivalents and restricted cash		1,400	198
Cash, cash equivalents and restricted cash at beginning of the period		1,585	2,297
Cash, cash equivalents and restricted cash at end of the period	[2]	2,985	2,495
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt and capital leases		139	907
Airport construction financing		$ 12	$ 32

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the consolidated balance sheet:Reconciliation of cash, cash equivalents and restricted cash: Current assets: Cash and cash equivalents$2,884 $2,371Restricted cash included in Prepaid expenses and other13 15Other assets: Restricted cash94 115Total cash, cash equivalents and restricted cash $2,991 $2,501

[2] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the consolidated balance sheet:Reconciliation of cash, cash equivalents and restricted cash: Current assets: Cash and cash equivalents$2,878 $2,365Restricted cash included in Prepaid expenses and other13 15Other assets: Restricted cash94 115Total cash, cash equivalents and restricted cash $2,985 $2,495